BlackRock has partnered with Securitize to launch their BUIDL fund on five different blockchains.BUIDL is BlackRock's tokenized treasury fund, represented by digital tokens, making it easier for people to invest.The five blockchains chosen by BlackRock offer speed, low costs, and secure technology, expanding access to the fund.BlackRock's partnership with Securitize combines investment expertise with digital asset knowledge for safer investing.